Map Direction Compass DC47
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Model: DC47
Name: Professional map compass, ruler compass
Product Origin: China
Supply Ability: 10,000 pcs/month
Minimum Order: 30 pcs
MOQ for OEM package: 500pcs
Material: Plastic
Features
1, professional usage: orientation, distance measuring, measuring slope, azimuth and pitching Angle measurement, drawing, a magnifying glass
2, high quality compass with neck rope, portable and rugged
3, ACRYLIC material, about 2mm thick
4, Damping Dial: to keep the stability of the pointer, more suitable for outdoor
environment.
5, Accuracy: accurate and clear, there were 360 degrees azimuth Angle, outer ring is 64-00 system, Liquid filled in the compass for reliable readings.
6, Magnifier function
- Q: What factors affect the handheld GPS receive signal?
- The United States Department of defense. A SA satellite signal to interference (the U.S. government for consideration of security of civil code of a called "selective availability (Selective SA Availability)" interference, to ensure the best protection system is effective. Because of the random error information added by SA in the navigation message, the positioning accuracy of the civil signal C/A code is reduced to about 100 meters. However, the use of differential GPS technology, the system error can be reduced to 10 to 15 metersTwo. Weather factors (including sunspots, bad weather, etc.) to reduce the intensity of the received signalThree. In buildings, vehicles, insulation paper, or metal shielding, GPS signal will be reduced or completely lost signal. In open spaces, GPS devices receive the best signal. .
- Q: Highway measurement with GPS I do not know which of the base station settings and mobile station settings I are very vague, to the instrument to build a coordinate system how to build the relevant issues to me
- Application of GPS in Highway SurveyHighway routes are generally in a ribbon corridor. It is often used in the plane control measurement, which includes the form of wire, closed wire, wire and so on. For important structures such as bridges, bridges, tunnels, etc., but also arranged into triangular network, linear lock and other forms.
- Q: Handheld GPS need to put the phone card?
- Travel GPS professional solutions:Put card. Will be equipped with a card at the time of purchase.
- Q: What is the difference between the phone's GPS and professional handheld GPS features and differences?
- But because it is a built-in or external Bluetooth GPS so the accuracy is not good at least a few meters there will be a gap drift phenomenon is simple said you drive open what is displayed on the screen of your car has been in the car to go outside for a while after a while back lane unstable and power consumption a larger say to you if you are a fresh hand if there is WM or Symbian system that will buy a mobile phone Bluetooth GPS module in Internet search navigation software can be installed navigation
- Q: Can a handheld navigator connect a cell phone? Thank you
- Open the phone hotspot WiFi, handheld navigator connected to this wifi.
- Q: I am a handheld GPS precision is low, how to use to be able to improve certain accuracy.
- If the carrier phase measurement function is not available, you have the maximum accuracy of GPS accuracy of 1-10This can only improve the observation environment using SBAS and other ways to improve the accuracy
- Q: Jia Ming etre20 handheld GPS good
- Jia Ming eTrex 20 has a microSD card slot and 1.7GB built-in memory space eTrex 20 allows you to store more user acquisition information, in addition to the map expansion slot, you can load the map of the global area of Garmin.
- Q: Verify the accuracy of the GPS device to buy back, the way is to use Android under the'gps state 'software, to test the accuracy of real-time single point positioning.1 with two sets of the same Android Tablet Computer (custom machine, type of bad) in the same position for receiving, find that the accuracy is the same (software, are 1-2 meters), but the position would be poor 10 meters or more. It's in the same place.The 2 one is the Android tablet computer, a mobile phone is HTC G10, also received together in the same position, find that the accuracy is not the same as (the latter 20 meters or so), but also may be about 10 meters position difference.The accuracy of this GPS device can reach 1-2 meters, while the same location in real-time single point positioning error of 10 meters, a reasonable explanation.
- You are very normal, the tablet computer and mobile phone antenna, not inside, the highest accuracy is about 10 meters, as ordinary navigation is good enough, to achieve centimeter level accuracy by GPS single is, that is to achieve the RTK measurement, is the application of professional measurement, now RTK or by the United States GPS satellite, not the United States GPS satellite as China Beidou mobile station and the base station is in need of mutual difference calculation to achieve accurate measurement. Now the single can receive SBAS signal, single precision up to 1-2 meters, the Northeast in some places to achieve sub meter level, which is the highest single precision can reach, is also used in field investigation using professional machine.
- Q: What do you need to test for GPS?
- 5.DGPS you know, differential GPS (DGPS) positioning accuracy is very high, some GPS equipment providers set up a DGPS transmitter in some areas, free of charge to its customers, if customers are buying GPS receivers with DGPS function. The DGPS transmitter is a fixed GPS receiver (in a 100km ~ 200km exploration scene in the radius setting) receive satellite signals, it knows exactly what is the exact time of transmitting satellite signal to the theory, and then compare it with the actual delivery time, then calculate the "difference", influence this is very close to the atmospheric refraction, it will send out the difference, usually with FM (FM) radio data transmission using subcarrier modulation signal in the baseband receiver, GPS and DGPS function can receive and use it more accurate positioning.
- Q: What qualifications should a normal GPS locator have?
- Look at his company's business license is what's on the line, if the manufacturer has the most basic 3C proved, and some such as system certification or proof of what the explosion proof CEPREI
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Map Direction Compass DC47
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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